A method for treating hair includes applying a first composition to the hair in a foam form and applying a second composition to the hair in foam form. The compositions are mixed on the hair. The first composition may include an oxidative dye. The second composition may include a oxidizing component such as hydrogen peroxide. An applicator for applying the compositions to the hair may take the form of a brush having a cavity thereon through which the foam compositions are delivered to the hair. A kit including the an aerosol container housing the oxidative dye, an aerosol container housing the oxidizing component, and a brush applicator may also be provided.